提高大跨PC连续刚构桥耐久性的关键措施  

Key Measures Toward Enhancing the Durability of Large-Span PC Continuous Rigid Frame Bridge

作　　者：刘山洪[1] 

机构地区：[1]西南交通大学交通运输工程学院博士后流动站

出　　处：《徐州建筑职业技术学院学报》2006年第2期1-4,共4页Journal of XUZHOU Institute of Architectural Technology

基　　金：西部交通科技项目"桥梁通行能力评定与网级技术改造"(200131822336)

摘　　要：桥梁耐久性设计概念已逐步成为桥梁设计的发展趋势.采用悬臂浇筑施工法施工的大跨PC连续刚构桥,在使用中其持久承载力不断地降低已成为事实.在分析影响其耐久性的因素的基础上,提出了如何有效地控制和提高其持久承载力设计的关键措施,阐述了提高其耐久性施工措施的一般性原则.The design concept of durability has progressively become the tendency toward the development of bridge design. It has become to pass that the permanent load-bearing capacity of the large-span PC （prestressed concrete） continuous rigid frame bridge constructed with the cantilever site cast construction method keeps cutting down in service. On the basis of an analysis of the factors affecting the durability, put forth are the key measures in design for effectively controlling and enhancing the permanent load-bearing capacity, and set forth is the general principle of construction method for the enhancement of the durability.

关 键 词：预应力混凝土 连续刚构桥 耐久性 持久承载力 设计理念 

分 类 号：U448.23[建筑科学—桥梁与隧道工程] U445.466[交通运输工程—道路与铁道工程]